Engine-starting mechanism.



E. A. J UHNSTON.

ENGINE STARTING MECHANISM. APPLICATION FILED APR. 1, i912.

1,185,910. lzltvntml 11111615, 1916.

2 SHEETS SHEET l- 1 'iiiiiiiiiii i i" =i f onrrnn srarrns PATENT ornicn.

EDWARD A. JOHNSTON, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO INTERNATIONAL Specification-f Letters l atent.

HARVESTER CORPORATION, 'A CORPORATION OF NEW JERSEY.

Patented June 6, 1916.

App ication filed April 1, 1912. Sria1No.687,837

To all whom it may concern Be it known that I, EDWARD A. J oI-Ixs'iox, a citizen of the United Statedresiding at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Engine Starting Mechanism, of which the following is a specification.

.by an engine My invention relates to mechanism wherehaving a high horse power rating and comprising heavy operative parts them from a state of rest to one-0f motion, may be given initial movement by a supplemental and smaller engine that may be readily connected therewith and disconnected there from, the means being adapted in particular.,for use in'connection withithe operation of internal combustion. engines of large .di-

mensions wherein, in order to obtain an explosive mixture-in the power cylinder, or cylinders, it is necessary, in starting the to rotate the fly wheels thereof several'times by hand or other auxiliary power,

which is comparatively easy in. operating small engines, as but little power is I re-:

quired to impartthe necessary initial revo'-.- lutions; b11t ;great difficulty is experienced 25 to 50 horse in starting engines with power; the object of myinventionibeing to 'provide'means' whereby an auxiliary engine .a larger-engine in order to givemaybe connected with initial movement thereto and be quickly disconnected when that object has been accomplished;

attain these objects by means of the mechanism illustrated by the accompanying drawings, in Whichof small dimensions "Figure 1 represents a plan view of-part of a large internal combustion engine hav-,

ing .a' smaller engine mounted adjacent I thereto, and illustrating the manner of connecting it withthe larger one; Fig. 2 is a side elevation of Fig.

Fig. 4 is. a detached de.'-

1'; Fig. 3 is an end elevation of Fig. 1. tail on an enlarged scale of part of the means for connecting the small engine with thelarger one; and Fig. 5 is a side elevation of Fig. 4:. v

Like reference characters designate the same parts throughout. the several views. 7

1 represents the power cylinder ;of a large internal combustion ,engine, 2 the crank case secured to a base frame including longitudinally arranged; sill members 3 designed to form a part of the truck frame of a traction engine, l the crank shaft having. a fly wheel 5 secured to the end thereof, 6 represents a small internal combustion engine having; its power cylinder T and a crank base plate that is secured justably secured to the upper side of the.

truck frame members adjacent the periphery of the flywheel of the large engine. ghe plate is provided at the end toward the wheel with vertically arranged ear members 12 that are spaced apart in a man-- ner to receive between them depending ear.

members 13 integral with the'bottom o fthe crank case 8, and 14: represents a pin passing through openings in the' ear members and constituting a pivotal connection. between the gine may 15 represents vertically arrangedea-rmemr bers at the. opposlte endof the plate that are provided with openings that receive a engine and pl'atewhereby the en be rocked about the axis thereof.v

transverselyarranged rock shaft 16 pro-.

vided with a hand crank17 upon the outside end there'of and with an'enlarged head portiony18- at the opposite end thereof,v the enlarged portion being arranged" eccentric to the axis of the shaft. I

integral with the engine cylinder 7 directly above the axis of shaft '16, and provided with,

a horizontally-arranged borein which is journa'led arocking tion adapted to receive the inner end of a set stud is held against longitudinal movement screw 23 threaded in the boss, wherebythe and permitted to rock about the axis thereof.

19 represents a laterally projecting boss" stud 20, the head of the stud being provi'ded with. a vertically arrangedthreaded opening 24 represents a split ring. in which is j our- I naled the eccentric head 18 of therock shaft 16, the ring'being provided with ear members 25 upon opposite sides of the slotted opening therein that receive a clamping screw 26 .m. a manner whereby to closely engage the eccentric head 18.

the'ring may be caused 27 represents a boss arranged upon the up per sidepof th' fing and provided with a power impulses in the usual way, and then threaded opening therein that receives the lower end of the connecting rod 21.

28 represents the crank shaft-of the engine 6, having a fly wheel '29 securedto its inner end, and a friction wheel 30 to-its outer end that is adapted to engage with the periphery of the fly wheel of the large engine when )the small engine is rocked in one direction about the axis of pin 14:. The crankshaft 28 extends beyond the friction wheel 30 and is adapted to receive a starting crank in any preferred manner. In operation, with the small engine adjusted'upon the truck frame the small engine is disconnected by a reverse movement of the crank 14 By having the small. engine adjustable upon the truck frame toward or from the fly wheel of the large engine, 1t may be moved thereon 1n a manner to compensate for wear of the fr1c-' tion wheel, and, by means of clamping screw 26, the ring 24 may be caused to engage with the eccentric head-18 in a frictlonal manner suficient to retain the wheel 30in engagement with the fly wheel of the large engine without other securing means.

- hat I claim as my invention, and desire to secure by Letters Patent, is:

1. A starting mechanism for internal combustion engines having, in combination, a

relatively small engine including a power cylinder, a crank case, a crank shaft journaled in bearings carried by said crank case, a friction wheel secured to said crank shaft, a base plate, said crank case having apivotal connection with said base plate, said base plate being supported adjacent a larger engine in a manner whereby said friction wheel is in close proximity to the periphery of a fly wheel forming part of the larger en.- gine, and means for rocking said small engine about the pivotal connection thereof with said base plate, said means including a rock shaft journaled upon said base plate, said rock shaft having an enlarged portion eccentric to the axis thereof, a ring receiving said eccentric portion and a rod connecting said ring with said power cylinder whereby a rocking movement of said shaft will raise or lower said cylinder and cause said friction wheel to move toward or from the periphery of a fly wheel forming part of the larger engine.

2; In combination, two engines having ro-' tat-able elements normally out of engagement with each other, one of said engines being pivotally -mounted on. and for starting the other engine, and rocking eccentric means for moving said elements into engagement with each other for starting purposes.

3. In combination, two engines having rotatable elements normally out of engagement with each other, one of said engines being movable with respect to the other and for starting said other engine, and eccentric means for moving one of said engines and also securing said elements into engagement with each other for starting purposes.

EDWARD A. JOHNSTON.

itnessesz A. L. Gnoons, A. F. BROWN. 

